Final answer:
The Mexican War for Independence led to Alta California becoming part of Mexico, but it later became part of the United States after the Mexican-American War.
Step-by-step explanation:
The Mexican War for Independence had a significant impact on Alta California, which is now known as the state of California in the United States. As a result of the war, Alta California became part of Mexico. However, this changed when the Mexican-American War concluded in 1848 with the signing of the Treaty of Guadalupe Hidalgo. The treaty resulted in the cession of Alta California and other territories to the United States, and Alta California became part of the expanding American nation.